... High Quality Square/Rectangular Pipe with Certifications Standard JIS, GB, ASTM Shape Square Application Structure Pipe TypeHigh Quality Square/Rectangular Pipe with CertificationsSpecification20*20 ... BS1387-1985MaterialQ195,Q215,Q235,Q345,10#,20#,45#,,12Cr2Mo,10CrMo910Zinc-coating100-300g/m2PackingStandard ... and technique with smooth finish, high corrosion resistance and pressure resistance.2 ...